Promote AgentCompany-New to the repository root and retire the old app

The legacy application - its src, tests, landing site, promo assets, docs,
release tooling, CI workflows, and root configs - leaves the tree; it stays
reachable in history. Everything under AgentCompany-New moves up unchanged:
same package name, so the production userData/database path is untouched,
and e2e/build scripts already resolved paths relative to the project. The
developer cred.txt stays gitignored at its new location. Full verify:ci
passes from the new root.

src/main/app/coalesce.ts

@@ -0,0 +1,16 @@
+/**
+ * Wraps a notification callback so bursts collapse into one trailing call.
+ * Agent run loops emit change events per tool turn; without coalescing every
+ * emission forces the renderer through a full snapshot reload, which starves
+ * the UI thread once the database grows.
+ */
+export function coalesce(fn: () => void, delayMs: number): () => void {
+  let timer: NodeJS.Timeout | null = null;
+  return () => {
+    if (timer) return;
+    timer = setTimeout(() => {
+      timer = null;
+      fn();
+    }, delayMs);
+  };
+}